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  1. Chevy Silverado Forum (GMC Sierra)
    My just purchased a 2018 Silverado Ext. Cab., came with a unexpected bonus - 4WD! But now I cannot determine the towing max, between 6,100 and 9,100, b/c I have a "G80" RPO code, "posi" rear end, but what is the ratio? If I sound stupid... sorry.
  2. 97 Tahoe

    Like suburbans 84/1990 Older Tahoe's Always more to learn and I like turning wrenches!!!:giggle:
  3. GM Powertrain
    I have a 3500 4x4 crew cab and the rear diff went out. It has a 4.10 ratio. I am looking for information on a replacement unit. My truck is a SRW. I have located a unit from a 2015 and wondering if anyone knows if it would fit. I understand that my model of DIFF may be the same as in other...
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